Argillite and Tonalite Definition

Definition of Argillite and Tonalite

The general Argillite and Tonalite definition can be stated as: Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. On the other hand, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Along with definition of Argillite and Tonalite, get to know about Properties of Argillite and Tonalite. Get to know more information about Argillite and Tonalite origin and discoverer, etymology and class.

History of Argillite and Tonalite

The history of Argillite and Tonalite gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Argillite and Tonalite Origin and Discoverer

Argillite and Tonalite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Argillite and Tonalite. In this section, you will know about Argillite and Tonalite Origin and Discoverer. Origin of Argillite is Unknown whereas Origin of Tonalite is Tonale, Italy. It is interesting to know the name of Argillite and Tonalite discoverer. The discoverer of Argillite and Tonalite are Unknown.

Etymology of Argillite and Tonalite

Along with Argillite and Tonalite definition, know more about the etymology of Argillite and Tonalite. Etymology of Argillite and Tonalite gives information about origin and formation of a particular rock. Know more about Formation of Argillite and Formation of Tonalite. The etymology of Argillite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite while that of Tonalite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Argillite belongs to Sedimentary Rocks while Tonalite belongs to Igneous Rocks. The sub-class, group and other categories of Argillite and Tonalite are listed below.

For Argillite,

• Sub-class: Durable Rock and Soft Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock

For Tonalite,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• Other Categories: Coarse grained rock, Fine grained rock, Medium grained rock and Opaque rock